I think it is the MFR, yes. There's no power running to the pump as far as I can tell and I don't hear the usual start up whir of my fuel pump.

My father's a mechanic. He informed me that it is quite rare for a fuel pump to all of a sudden randomly die.

The more I read about hot starting causing problems with MFRs, the more I feel that's what it is. I'm located in Northern Canada at the moment where temperatures in the winter routinely hit -35 below. This would mitigate hot starting and allow electricity to flow over a poorly built or faulty MFR.

Please understand, I moved the car into my garage where the temperature is 4 or 5 above zero.

Do you think my hypothesis is correct?